Mr. Burbank has a very highly developed color sense, and he is particularly partial to flowers that have delicate hues. He has found the Watsonias peculiarly responsive, and has produced varieties showing delicate tints almost rivaling those of the orchids. Here is a random cluster from his enormous Watsonia colony.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 9 Chapter 9